var str = "hello";

for(var i=0;i<str.length;i++){
    console.log(str[i])
}

if(str === "hello"){
    console.log(str + " world")
}


function fn(name){
    return "hello " + name;
}
console.log(fn("admin"));


console.log(str.split(""))

var obj = {
    name:"admin",
    age:19
}
for(var i in obj){
    console.log(i, obj[i])
}

console.log(new Date())

console.log(Math.round(Math.random()*10+5))

console.log("1f3yu2t4ytu14i34t5ug2".match(/\d+/g))

class Test{
    constructor(n){
        this.name = n
    }
    show(){
        console.log(this.name)
    }
}
const t = new Test("耶耶耶");
t.show();



